Office chair



FIG. 1 is a perspective view showing my new design.

FIG. 2 is a front view thereof.

FIG. 3 is a rear view thereof

FIG. 4 is a left end view thereof.

FIG. 5 is a right end view thereof; and,

FIG. 6 is a top view thereof.

The surface(s) or portion(s) of the article not shown in the drawing or described in the specification form(s) no part of the claimed design. 

CLAIM The ornamental design for a office chair, as shown. 